Wig material (4)
I believe the answer is:
hair
'wig material' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hair that I've seen before include "Musical - locks" , "Thread-like strands on the body" , "Filaments growing on the epidermis" , "Thread-like structure(s)" , "One's crowning glory?" .)